package com.itheima.jobs;

import com.itheima.constant.RedisConstant;
import com.itheima.utils.QiniuUtils;
import org.springframework.beans.factory.annotation.Autowired;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;

import java.util.Set;

/*
* 自定义方法，定时清理垃圾图片*/
public class ClearImgJob {
    @Autowired
    private JedisPool jedisPool;

    public void clearImg(){
        Jedis resource = jedisPool.getResource();
        //根据Redis中保存的两个set集合进行差值计算，获得垃圾图片名称集合
          Set<String> set =
                  resource.sdiff(RedisConstant.SETMEAL_PIC_RESOURCES,
                          RedisConstant.SETMEAL_PIC_DB_RESOURCES);
          if(set != null){
              for (String picName : set) {
                  //删除七牛云服务器上的图片
                  QiniuUtils.deleteFileFromQiniu(picName);
                  //从Redis集合中删除图片名称
                  resource.srem(RedisConstant.SETMEAL_PIC_RESOURCES,picName);
              }
          }

          //清空redis里面的集合数据

          resource.close();
    }


}
